US3568437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pollution control apparatus for internal combustion engine
Assignee: Individual
•
Filing: 1969-04-04
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Granted: 1971-03-09
•
Expires: 1989-04-04
Abstract
Abstract AIR POLLUTION CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE OF THE TYPE INCLUDING AN AIR INTAKE CONDUIT INCLUDING A THROTTLE VALVE THEREIN. THE APPARATUS COMPRISES AIR VALVE MEANS FOR CONTROLLING THE FLOW OF OUTSIDE AIR INTO SAID INTAKE CONDUIT DOWNSTREAM OF SAID VALVE AND LINKAGE MEANS FOR INTERCONNECTING THE THROTTLE VALVE AND THE AIR VALVE MEANS TO PROVIDE FOR AN INCREASE IN THE FLOW OF OUTSIDE AIR INTO THE CONDUIT WHEN THE THROTTLE VALVE IS IN AN ENGINE-IDLE OR SUBSTANTIALLY CLOSED POSITION AND FOR REDUCING THE PERCENTAGE OF OUTSID AIRFLOW INTO THE CONDUIT AS THE THROTTLE VALVE IS MOVE FROM THE IDLE POSITION TOWARDS AN OPEN OR FULL POWER POSITION.
Inventors
- 👤 Southwick W Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:24
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/02; F02M23/03; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S60/00; Y10S60/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |